A-LevelChemistryReaction kineticsOct/Nov 2020Paper 5 Q36 Marks
A student investigates the reaction between magnesium and hydrochloric acid to determine the order of reaction with respect to hydrochloric acid. The student is supplied with 2.00 mol dm⁻³ hydrochloric acid and six identical, clean pieces of magnesium ribbon. In experiment 1, the student places 50 cm³ of 2.00 mol dm⁻³ hydrochloric acid in a 100 cm³ beaker and adds a piece of magnesium ribbon to the acid in the beaker. The student records how long it takes for the magnesium ribbon to disappear. The student carries out five further experiments, diluting the 2.00 mol dm⁻³ hydrochloric acid each time to provide results from five different concentrations of acid. The student carries out each experiment in a 100 cm³ beaker.
✓ Correct Answer
The correct answer is —. This question tests the candidate's understanding of reaction kinetics within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep